I'm using Ubuntu 18.04 and have used GNOME Tweaks(1) to restore normal keyboard layout switching behavior where pressing Alt+Shift cycles between enabled layouts. I've also used Gnome Settings(2) in an attempt to restore normal windows switching where Alt+Tab brings up a list of windows and moves the selected window from the most recently-used window to the least, and Shift+Alt+Tab moves the cursor in the opposite direction.
Keyboard layout works well. Window switching does not: Alt+Tab behaves as expected but Shift+Alt+Tab does not because it changes the keyboard layout rather than traverse the window list.
How can I restore normal Shift+Alt+Tab functionality when using multiple layouts? I know it's possible because I've read a blog post on how to do it once, however I was unable to find said blog post again.
Edit: Found it! See: https://www.guyrutenberg.com/2015/10/02/gnome-altshift-and-altshifttab/
Edit2: I believe this is not a duplicate of OS keyboard shortcuts conflict with apps keyboard shortcuts in GNOME 3 because it's specific to Shift+Alt and that specificity seems to have allowed for an acceptable workaround. See my answer below.
- The setting is under Tweaks > Keyboard & Mouse > Additional Layout Options.
- Normal Keyboard Shortcut reassignment.